SA164SO
Installation of sNM-Lpt vertical tail, wing tips and elevator (STC SA303CE-A is prerequisite to this STC); in- stallation of Lycoming IO-720-A1A engines (STC SE163CE-A) and Hartzell HC-A3VK-2/V8433-4R propellers. Held by Riley Turbostream CORP, which holds 19 approved modifications in all. Last revised August 6, 1974. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The de Havilland Aircraft Co. Ltd (England); The de Havilland Aircraft Co. Ltd (England); The de Havilland Aircraft Co. Ltd (England); The de Havilland Aircraft Co. Ltd (England)
- Models
- DH 104 Dove Series 6A, DH 104 Dove Series 5A, DH 104 Dove Series 2A, DH 104 Dove Series 1A
- Type certificates
- A-807, A-807, A-807, A-807
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.